A .NET library for hardware-accelerated, high performance, immediate mode rendering via Direct2D.

By using the graphics context to draw anything on windows form, control or draw in memory via Direct2D. The graphics interface is designed like the normal Windows Form graphics interface, it's easy-to-learn and user-friendly.

install-package unvell.d2dlib

Or install for x64 platform:

install-package unvell.d2dlib-x64

The Direct2D API is a platform-associated API that requires the application to be targeted to either x86 or x64 platform. To run the application uses this library correctly, the Platform target of the project settings must be set to x86 or x64.

Use git to clone the source code repository

git clone https://github.com/jingwood/d2dlib

Open d2dlib.sln from the src folder with Visual Studio 2019 or later, choose Build -> Batch Build... menu, then click Build button.

1. Add d2dlibexport.dll and d2dwinform.dll as application references
2. Put d2dlib32.dll in the Debug, Release or the folder where the application runs

You can also add d2dlib32.dll as a project file, and set it's property Copy to output folder to Copy if newer.

For different build configuration and platform target, the d2dlib32.dll is named as following:

1. Make windows form or control inherited from D2DForm or D2DControl class
2. Override OnRender(D2DGraphics g) method (do not override .NET OnPaint method)
3. Draw anything inside OnRender method via the g context

protected override void OnRender(D2DGraphics g)
{
  var rect = new D2DRect(0, 0, 10, 10);
  g.DrawEllipse(rect, D2DColor.Red);
}

var ellipse = new D2DEllipse(0, 0, 10, 10);
g.DrawEllipse(ellipse, D2DColor.Gray);

g.DrawText("Hello World", D2DColor.Yellow, this.Font, 100, 200);

var brush = Device.CreateSolidColorBrush(new D2DColor(1, 0, 0.5));
g.DrawEllipse(rect, brush);

var brush = Device.CreateLinearGradientBrush(new D2DPoint(0, 0), new D2DPoint(200, 100),
  new D2DGradientStop[] {
    new D2DGradientStop(0, D2DColor.White),
    new D2DGradientStop(0.5, D2DColor.Green),
    new D2DGradientStop(1, D2DColor.Black),
  });

g.DrawBitmap(bmp, this.ClientRectangle);

// convert to Direct2D bitmap
var d2dbmp = Device.CreateBitmapFromGDIBitmap(gdiBitmap);

// draw Direct2D bitmap
g.DrawBitmap(d2dbmp, this.ClientRectangle);

// create and draw on GDI+ bitmap
var gdiBmp = new Bitmap(1024, 1024);
using (Graphics g = Graphics.FromImage(gdiBmp))
{
  g.DrawString("This is GDI+ bitmap layer", new Font(this.Font.FontFamily, 48), Brushes.Black, 10, 10);
}

// draw memory bitmap on screen
g.DrawBitmap(gdiBmp, this.ClientRectangle);

Learn more about Bitmap. See Example code

var bmpGraphics = this.Device.CreateBitmapGraphics(1024, 1024);
bmpGraphics.BeginRender();
bmpGraphics.FillRectangle(170, 790, 670, 80, new D2DColor(0.4f, D2DColor.Black));
bmpGraphics.DrawText("This is Direct2D device bitmap", D2DColor.Goldenrod, this.Font, 180, 800);
bmpGraphics.EndRender();

// draw this device bitmap on screen
g.DrawBitmap(bmpGraphics, this.ClientRectangle);

Note: When creating a Direct2D Device bitmap, do not forget call BeginRender and EndRender method.

By calling PushTransform and PopTransform to make a transform session.

g.PushTransform();

// rotate 45 degree
g.RotateTransform(45, centerPoint);

g.DrawBitmap(mybmp, rect);
g.PopTransform();

Fast images rendering See source code

Custom draw on memory bitmap See source code

Star space simulation See source code

Subtitle rendering See source code

Whiteboard App
See source code